iris diaphragm
An adjustable diaphragm by which the diameter of an approximately circular opening may…An adjustable diaphragm by which the diameter of an approximately circular opening may be controlled, as for regulating the aperture of a lens; it consists of a number of movable thin curved plates fastened at regular intervals around the inside of a ring, the positions of which are simultaneously adjusted by a single knob on the outside of the lens. It is used in cameras and microscopes.
Meaning
1 sensesAn adjustable diaphragm by which the diameter of an approximately circular opening may be controlled, as for regulating the aperture of a lens; it consists of a number of movable thin curved plates fastened at regular intervals around the inside of a ring, the positions of which are simultaneously adjusted by a single knob on the outside of the lens. It is used in cameras and microscopes.
Irisblende
diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening
Translations
1 languagesBy meaning 1
Origin
Derives from its action which is reminiscent of the iris of the eye.Derives from its action which is reminiscent of the iris of the eye.
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Forms
plural: iris diaphragms| Singular | iris diaphragm |
|---|---|
| Plural | iris diaphragms |
regular
Synonyms
1 synonyms- diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening:iris